Many attachments are too large to be sent in e-mail through Outlook Express. Sending a message that exceeds the size limit of messages for the sender or receiver will result in the message being sent back. When sending a message through the Internet, the size may increase by one third during the transit process due to encoding. This could also result in a message being rejected by a mail server. Follow these instructions to reduce the size of attachments in Outlook Express.
Create a new e-mail message by opening Outlook Express and pressing "New" in the upper left-hand corner.
Click the "Insert" tab, then "Attach File".
Navigate to the item that you would like to attach to the email message, then double-click it.
Click the small arrow in the lower right-hand corner of the "Insert" tab. This will show the "Attachment Options" dialogue box on the right-hand side of your message.
Select the desired picture size under the "Picture Options" in the "Attachment Options" dialogue box.
Continue composing your message, and then press "Send."
Navigate to the folder containing the attachment that you are wanting to send. You can do this by opening "My Computer" and then clicking the disk drive that contains the folder and searching for the file.
Right-click the file that you wish to send, point to "Send To" and click "Compressed Folder." Windows will create another file with the same name as your original file, but it will be a zip file. This file will be located in the same folder as the original file.
Right-click the new zip icon, point to "Send To," and then click "Mail Recipient." A new mail message will open from Outlook Express.
Continue composing your message as you normally would, and press "Send" when you are finished.